<?php
function outGrade($grades){
    asort($grades);
    $keys=array_keys($grades);
    $maxlndex=count($keys)-1;
    $minBh=$keys[0];
    $maxBh=$keys[$maxlndex];
    echo "打出最低分的裁判是：",$minBh,"打分为：",$grades[$minBh],"\n";
    echo"打出最高分的裁判是：",$maxBh,",打分为：",$grades[$maxBh],"\n";
    echo "最后得分是：",round((array_sum($grades)-$grades[$minBh]-$grades[$maxBh])/($maxlndex-1),2);

}
$grades = [
    '一号裁判'=>98.2,
    '二号裁判'=>97.5,
    '三号裁判'=>91,
    '四号裁判'=>89,
    '五号裁判'=>99,
    '六号裁判'=>98.5,
    '七号裁判'=>96.6,
    '八号裁判'=>93.4,
];
outGrade($grades);

